Question

What exactly is a basis in the context of crystalline solids?

Answer 1

The crystal basis is the arrangement of atoms that is particular to the mineral ... Lattice points: Point in a crystal with specific arrangement of atoms, .... Can define a fourth lattice vector at 120° 

Answer 2

Explanation:

Crystalline solids are those in which the atoms, ions, or molecules that make up the solid exist in a regular, well-defined arrangement. The smallest repeating pattern of crystalline solids is known as the unit cell, and unit cells are like bricks in a wall—they are all identical and repeating.